JP6628172B1 - Disaster escape route guidance system and disaster escape route guidance method - Google Patents

Abstract

An object of the present invention is to accurately estimate a route for a person who wants to escape safely from a building at the time of a disaster. A plurality of transmitters for transmitting a signal representing a unique transmitter ID are discretely installed in a building having a plurality of floors. Upon receiving a signal from any of the transmitters, the plurality of communication terminals of the plurality of escape applicants from the building transmit the transmitter ID of the signal to the server. The server estimates the evacuation route actually used for each escape applicant from the time history of the transmitter ID, and for each floor, it is estimated that a plurality of escape applicants are individually used. Of the common routes among the evacuation routes of each of the evacuation routes is estimated as a common successful escape route for those who wish to escape, and the traveling speeds of a plurality of escape applicants along the same successful escape route are calculated, and each successful escape route is calculated. The degree of difficulty of escape from the building is estimated for each case, evacuation guidance information is generated based on the successful escape route and the degree of difficulty of escape, and the information is distributed to communication terminals of a plurality of other escape applicants. [Selection diagram] FIG.

Description

The present invention relates to a technology for analyzing a moving route or a flow of a plurality of people in a closed space such as a building, and more particularly to a technology for guiding a route for safely escaping a plurality of people from a building during a disaster. .

  Several techniques have been proposed for analyzing the travel routes of multiple people in a closed space such as a building. One example of this technique is a plurality of people who wish to escape from a building (eg, a building, a tunnel, an underground mall, etc.) during a disaster. Is a technology that guides the route to escape safely.

  As a technique for guiding an evacuation route at the time of a disaster, for example, Patent Document 1 discloses an evacuation route map creation system. In this system, an evacuation applicant carries a portable terminal, and the portable terminal measures its own current position by GPS and transmits it to the center device. When a disaster occurs, this system specifies an evacuation route that can be passed without fail, based on information on the route actually passed by the evacuation applicant.

  Patent Literature 2 discloses an evacuation route guidance system. In this system, a transceiver is installed at each of a plurality of locations on the evacuation route. The server transmits evacuation route information to each transceiver at the time of disaster. This server calculates an evacuation route according to the current position of the evacuee's mobile terminal. The mobile terminal of the refugee receives the evacuation route information from each transceiver.

  Patent Document 3 discloses a method for detecting the position of a fire brigade member. According to this method, an antenna is installed on each floor of the building. Firefighters carry the transmitter. The position of the fire brigade is detected from the radio wave received by the antenna from the transmitter.

  Patent Literature 4 discloses a position specifying system that specifies the position of a resident (rescue target and rescue squad) in a building having a plurality of floors. In this system, a plurality of transmitters are installed in a room, and a visitor carries a portable terminal. Each transmitter transmits a signal, which is received by the portable terminal. The mobile terminal replies to the transmitter that received the signal. When the transmitter receives the signal, the transmitter sends its ID to the server.

  Patent Literature 5 discloses a position information acquisition system as a technique for analyzing a moving route for a visitor in a closed space such as an exhibition room or a store and analyzing an object of interest of the visitor, instead of supporting evacuation. It has been disclosed.

  In this system, visitors carry a mobile terminal. A plurality of radio transmitters are installed in a building such as an exhibition room, a store, and the like. The mobile terminal receives radio wave information (position information) from each radio transmitter, generates the mobile terminal itself, and generates azimuth information. The mobile terminal transmits the position information and the direction information to the management server at predetermined time intervals. The management server calculates the movement trajectory of each mobile terminal from the received information, calculates the stay time at each point in the movement trajectory, and detects the orientation of the mobile terminal at each point.

JP 2011-95850 A JP 2007-11830 A JP 2005-55186 A Japanese Patent No. 6321134 JP 2015-152483 A

  At the time of a disaster, multiple transmitters installed in a building (this term is used synonymously with a building throughout this document to include structures such as tunnels) By using the mobile terminal of the escape applicant who wishes to escape, that is, to evacuate, it is possible to detect the actual moving route in the building, that is, the evacuation route.

  Then, if the evacuation route detected in such a way is guided to another escape applicant who is about to escape from the same building, the escape applicant will be more reliable than if he could not rely on any information Is expected to escape from the building.

  However, at the time of a disaster, there are multiple evacuation routes for the same building. For example, in a multi-storey building, which stairs (indoor stairs, emergency stairs, etc.) and which aisle are used when an escape applicant walks down from an upper floor to a lower floor? From the point of view, there are potentially multiple evacuation routes.

  However, since the evacuation route actually used is different from each other at the position where the escape applicant starts evacuation (for example, how many floors are on the floor), there is a possibility that the evacuation route is different for each evacuation start position, ie Sex exists.

  Furthermore, in the event of a disaster, the situation of damage to the building and the location of the damage gradually change, and it is undeniable that a safe evacuation route may be changed to a dangerous evacuation route one minute later. That is, the evacuation route also has time dependency.

  Furthermore, when there is an evacuation route used by the first escape applicant, there is a possibility that the use has been achieved because the escape applicant was the left escape applicant. That is, the evacuation route also has user dependency.

  Therefore, the evacuation route actually used by a certain escape applicant is not necessarily safe for another escape applicant, and to escape from the same building at another place and at another timing. Absent.

  Therefore, a real safe evacuation route is estimated in real time at each evacuation start position (for example, each floor) and at each moment of the evacuation applicant, and an attempt is made to escape from the building using the result as evacuation information. It is desirable to provide to those who want to escape.

  Furthermore, only when there is a fact that the same evacuation route has been used by multiple escape applicants at the same timing, the evacuation route should be guided to other escape applicants with high reliability. it is conceivable that.

In view of the above-described findings, an object of the present invention is to provide a technique for accurately estimating a route for a plurality of escape applicants to safely escape from a building at the time of a disaster .

In order to solve the problem, according to one aspect of the present invention, there is provided a system for guiding a route for a plurality of escape applicants to safely escape from a building during a disaster,
A plurality of transmitters spatially discretely installed in the building, wherein each transmitter transmits an identification signal representing a unique transmitter ID;
A plurality of communication terminals carried by a plurality of escape applicants, each of which can receive an identification signal from each transmitter by a short-range wireless communication method,
A management server capable of communicating with the plurality of communication terminals;
Including
The building has a plurality of floors,
Upon receiving a signal from any of the transmitters, the communication terminal of each escape applicant receives a transmitter ID represented by the signal and a terminal / user ID which is identification information of the communication terminal or identification information of the user. A transmission unit for transmitting to the management server,
The management server,
A receiving unit that receives the transmitter ID and the terminal / user ID from each communication terminal;
A storage unit that stores the received transmitter ID in a memory in association with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID. When,
According to a predetermined relationship between the transmitter ID and the spatial coordinate values stored in the memory, for each escape applicant, the time of the plurality of transmitter IDs stored in the memory The history is converted into a time history of a plurality of spatial coordinate values representing the installation positions of the plurality of transmitters corresponding thereto, and for each escape applicant, from the time history of the plurality of spatial coordinate values, An evacuation route estimator for estimating the evacuation route actually used;
For each floor of the building, a plurality of evacuation routes presumed to have been individually used by a plurality of escape applicants. A successful escape route estimating unit for estimating the escape route;
Based on a time difference between a plurality of transmission times or a plurality of reception times stored in the memory in association with a plurality of transmitter IDs corresponding to the estimated successful escape route, a plurality of persons wishing to escape along the same successful escape route are determined. Based on the plurality of traveling speeds calculated for each successful escape route, the degree of difficulty in escaping from the building using the successful escape route for each successful escape route. An escape difficulty estimator for estimating the escape difficulty,
Evacuation guidance information is generated based on the successful escape route estimated for each floor and the degree of escape difficulty estimated for each successful escape route, and the evacuation guidance information is communicated to a plurality of other escape candidates. An evacuation guidance information distribution unit that distributes the evacuation guidance information among a plurality of escape applicants,
And a disaster escape route guidance system is provided.

According to another aspect of the present invention, there is provided a method for guiding a route for safely escaping a plurality of escape applicants from a building during a disaster,
In a building having a plurality of floors, a plurality of transmitters for transmitting a signal representing a unique transmitter ID are installed spatially discretely,
The method is
A plurality of communication terminals of a plurality of escape applicants from the building, when receiving a signal from any of the transmitters, transmitting a transmitter ID of the signal to a management server;
The management server estimates the evacuation route actually used for each escape applicant from the time history of the transmitter ID, and it is estimated that a plurality of escape applicants individually used for each floor. Estimating a common part of the plurality of evacuation routes as a successful escape route common to the escape applicants;
The management server calculates the moving speed of each of a plurality of escape applicants along the same successful escape route, and based on the plurality of moving speeds calculated for each successful escape route, for each successful escape route, Estimating the difficulty of escaping from the building;
A step in which the management server generates evacuation guidance information based on the successful escape route and the degree of difficulty in escaping, and distributes the evacuation guidance information to a plurality of communication terminals of a plurality of other escape applicants;
And a disaster escape route guidance method is provided.

  The following aspects are obtained by the present invention. Each mode is divided into sections, each section is numbered, and described in a format in which the numbers of other sections are cited as necessary. This is to facilitate understanding of some of the technical features that can be adopted by the present invention and combinations thereof, and the technical features that can be adopted by the present invention and combinations thereof are limited to the following embodiments. Should not be interpreted as That is, it should be construed that the technical features not described in the following embodiments but described in the present specification are appropriately extracted and adopted as the technical features of the present invention.

  Furthermore, listing each section in a form that quotes the number of the other section does not necessarily prevent the technical features described in each section from being separated from and independent of the technical features described in the other sections. It is to be construed that the technical features described in the respective sections can be appropriately made independent according to their properties.

(1) A system that guides a route for multiple escape applicants to escape safely from a building during a disaster,
A plurality of transmitters spatially discretely installed in the building, wherein each transmitter transmits an identification signal representing a unique transmitter ID;
A plurality of communication terminals carried by a plurality of escape applicants, each of which can receive an identification signal from each transmitter by a short-range wireless communication method,
A management server capable of communicating with the plurality of communication terminals,
Upon receiving a signal from any of the transmitters, the communication terminal of each escape applicant receives a transmitter ID represented by the signal and a terminal / user ID which is identification information of the communication terminal or identification information of the user. A transmission unit for transmitting to the management server,
The management server,
A receiving unit that receives the transmitter ID and the terminal / user ID from each communication terminal;
A storage unit that stores the received transmitter ID in a memory in association with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID. When,
According to a predetermined relationship between the transmitter ID and the spatial coordinate values stored in the memory, for each escape applicant, the time of the plurality of transmitter IDs stored in the memory The history is converted into a time history of a plurality of spatial coordinate values representing the installation positions of the plurality of transmitters corresponding thereto, and for each escape applicant, from the time history of the plurality of spatial coordinate values, An evacuation route estimator for estimating the evacuation route actually used;
Successful escape route in which, among a plurality of evacuation routes estimated to have been used individually by a plurality of escape applicants, a part common to each other in place is estimated as a successful escape route commonly used by those escape applicants. A disaster escape route guidance system that includes an estimation unit and.

(2) The management server further includes:
The estimated successful escape route is distributed to a plurality of communication terminals of other plurality of escape applicants, and thereby, the evacuation guidance information based on the successful escape route is shared among a plurality of escape applicants. The emergency escape route guidance system according to (1), including an escape route distribution unit.

(3) The evacuation route estimation unit includes a disaster determination unit that determines whether a disaster has occurred in the building,
The evacuation route estimating unit is activated when the disaster determining unit determines that a disaster has occurred,
The successful escape route estimation unit includes an escape determination unit that determines whether any of the escape applicants has successfully escaped from the building.
The successful escape route estimating unit is, among the plurality of estimated evacuation routes, one that is estimated to have been used by a plurality of escape applicants determined by the escape determination unit to have successfully escaped from the building. (1) or (2), wherein the successful escape route is estimated from the selected plurality of evacuation routes.

(4) The disaster escape route guidance system according to (3), wherein the disaster determination unit is linked with a fire alarm installed in the building or a disaster monitoring system existing outside the building.

(5) When the escape determination unit receives, from the communication terminal of each escape applicant, a transmitter ID of one of the plurality of transmitters located near the exit of the building or installed outside the building. The disaster escape route guidance system according to (3) or (4), wherein it is determined that each escape applicant has successfully escaped from the building.

(6) the building has a plurality of floors,
The disaster escape route guidance according to any one of (1) to (5), wherein the successful escape route estimating unit estimates a successful escape route for each floor of the building and sequentially and repeatedly in real time. system.

(7) Further, for each escape applicant, the success is determined based on a time difference between a plurality of transmission times or reception times stored in the memory in association with a plurality of transmitters corresponding to the estimated successful escape route. An escape difficulty estimating unit that calculates a moving speed of each escape applicant along the escape route, and estimates a degree of difficulty in escaping from the building using the successful escape route based on the calculated moving speed. The emergency escape route guidance system according to any one of (1) to (6), including:

(8) A program for causing a computer to function as the communication terminal according to any one of (1) to (7).

  Throughout this specification, the term "program" will be interpreted to mean, for example, a combination of instructions to be executed by a computer to perform its functions, Can be interpreted to include, but is not limited to, files and data processed according to.

  In addition, this program may achieve its intended purpose by being executed by a computer by itself, or may achieve its intended purpose by being executed by a computer together with other programs. Can, but is not limited to. In the latter case, the program according to this section can be mainly composed of data, but is not limited thereto.

(9) A program for causing a computer to function as the management server according to any one of (1) to (7).

(10) A recording medium on which the program according to (8) or (9) is recorded in a computer-readable manner.

  Throughout this specification, the term "recording medium" can be interpreted to mean various types of recording media, such as magnetic recording media, such as flexible disks. Media, optical recording media such as CDs and CD-ROMs, magneto-optical recording media such as MOs, and unremovable storages such as ROMs, but are not limited thereto.

(11) A system for analyzing a moving route of a plurality of people in a closed space,
A plurality of transmitters disposed spatially discretely in the closed space, each transmitter transmitting a signal representing a unique transmitter ID,
A plurality of communication terminals carried by a plurality of users, each of which can receive a signal from each transmitter in a short-range wireless communication system,
A management server capable of communicating with the plurality of communication terminals,
When the communication terminal of each user receives a signal from any of the transmitters, the communication terminal transmits the transmitter ID represented by the signal and the terminal / user ID that is the identification information of the communication terminal or the identification information of the user. Including a sending unit to send to the management server,
The management server,
A receiving unit that receives the transmitter ID and the terminal / user ID from each communication terminal;
A storage unit that stores the received transmitter ID in a memory in association with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID. When,
According to a predetermined relationship between the transmitter ID and the spatial coordinate values stored in the memory, for each user, the time history of the plurality of transmitter IDs stored in the memory is stored. Is converted into a time history of a plurality of spatial coordinate values representing the installation positions of a plurality of transmitters corresponding thereto, and for each user, from the time history of the plurality of spatial coordinate values, a travel route actually used by each user. A travel route estimating unit for estimating
Of the plurality of travel routes that are estimated to have been used individually by the plurality of users, a portion common to each other is extracted, and the plurality of routes are located at the same position as the extracted portion or at a position near the extracted portion. An interest target estimating unit for estimating that there is a target of interest commonly indicated by two users.

  Here, examples of the “closed space” include a store where a plurality of products are displayed, an exhibition room where a plurality of works are displayed, a museum, a museum, and the like.

(12) A system for analyzing a movement route of a plurality of people in a closed space,
A plurality of transmitters disposed spatially discretely in the closed space, each transmitter transmitting a signal representing a unique transmitter ID,
A plurality of communication terminals carried by a plurality of users, each of which can receive a signal from each transmitter in a short-range wireless communication system,
A management server capable of communicating with the plurality of communication terminals,
When the communication terminal of each user receives a signal from any of the transmitters, the communication terminal transmits the transmitter ID represented by the signal and the terminal / user ID that is the identification information of the communication terminal or the identification information of the user. Including a sending unit to send to the management server,
The management server,
A receiving unit that receives the transmitter ID and the terminal / user ID from each communication terminal;
A storage unit that stores the received transmitter ID in a memory in association with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID. When,
According to a predetermined relationship between the transmitter ID and the spatial coordinate values stored in the memory, for each user, the time history of the plurality of transmitter IDs stored in the memory is stored. Is converted into a time history of a plurality of spatial coordinate values representing the installation positions of a plurality of transmitters corresponding thereto, and for each user, from the time history of the plurality of spatial coordinate values, a travel route actually used by each user. A travel route estimating unit for estimating
For each user, from the time difference between a plurality of transmission times or reception times stored in the memory in association with a plurality of transmitter IDs corresponding to the estimated travel route, A bottleneck extracting unit that extracts a portion where the moving speed is lower than a reference value as a bottleneck.

  Here, the “closed space” includes, for example, a store where a plurality of products are displayed, an exhibition room or a museum where a plurality of works are displayed, a museum, and a plurality of interconnected under an organization. There are business entities (for example, companies, factories, hospitals, government offices, production sites, etc.) in which departments exist spatially discretely.

(13) A method of guiding a plurality of escape applicants to escape safely from a building during a disaster,
The method is
A plurality of transmitters spatially discretely installed in the building, wherein each transmitter transmits an identification signal representing a unique transmitter ID;
A plurality of communication terminals carried by a plurality of escape applicants, each of which can receive an identification signal from each transmitter by a short-range wireless communication method,
Executed using the management server capable of communicating with the plurality of communication terminals,
The method is
When the communication terminal of each escape applicant receives a signal from any of the transmitters, a transmitter ID represented by the signal and a terminal / user ID which is identification information of the communication terminal or identification information of the user are transmitted. Transmitting to the management server,
A receiving step in which the management server receives the transmitter ID and the terminal / user ID from each communication terminal;
The management server associates the received transmitter ID with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID, and stores the memory in association with the terminal / user ID. A preservation process for preserving the
The management server, according to a predetermined relationship between the transmitter ID and the spatial coordinate value stored in the memory, for each escape applicant, a plurality of stored in the memory The time history of the transmitter ID is converted into a time history of a plurality of spatial coordinate values representing the installation positions of the plurality of transmitters corresponding thereto, and for each escape applicant, from the time history of the plurality of spatial coordinate values, An evacuation route estimation step for estimating the evacuation route actually used by each escape applicant;
The management server sets a common part of the plurality of evacuation routes, which are presumed to be individually used by a plurality of escape applicants, as a successful escape route commonly used by the escape applicants. Estimating a successful escape route estimating step.

(14) A method of analyzing a traveling route of a plurality of people in a closed space,
The method is
A plurality of transmitters disposed spatially discretely in the closed space, each transmitter transmitting a signal representing a unique transmitter ID,
A plurality of communication terminals carried by a plurality of users, each of which can receive a signal from each transmitter in a short-range wireless communication system,
Executed using the management server capable of communicating with the plurality of communication terminals,
When the communication terminal of each user receives a signal from one of the transmitters, a transmitter ID represented by the signal and a terminal / user that is identification information of the communication terminal or identification information of the user are transmitted. Transmitting an ID to the management server;
A receiving step in which the management server receives the transmitter ID and the terminal / user ID from each communication terminal;
The management server associates the received transmitter ID with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID, and stores the memory in association with the terminal / user ID. A preservation process for preserving the
A plurality of transmitters stored in the memory for each user according to a predetermined relationship between the transmitter ID and the spatial coordinate value stored in the memory; The time history of the ID is converted into a time history of a plurality of spatial coordinate values representing the installation positions of a plurality of transmitters corresponding to the ID, and for each user, the time history of the plurality of spatial coordinate values indicates that the user A travel route estimating step of estimating a travel route used for
The management server extracts a portion common in terms of location among a plurality of travel routes estimated to be used individually by the plurality of users, and the same position as the extracted portion or in the vicinity thereof An interest target estimating step of estimating that a target of interest indicated by the plurality of users in common exists at a position.

FIG. 1 is an overall system diagram illustrating a disaster escape route guidance system according to an exemplary embodiment of the present invention. 2A is a partially transparent perspective view showing the building shown in FIG. 1, and FIG. 2B is a diagram showing two entrances and two stairs of the building shown in FIG. 2A. It is a top view which takes out and shows 2nd floor. FIG. 3 is a partial perspective view showing a room in the building shown in FIG. 1 in a state where a plurality of transmitters are installed on a vertical wall thereof. FIG. 4 is a functional block diagram showing each transmitter shown in FIG. FIG. 5 is a functional block diagram showing each mobile terminal shown in FIG. FIG. 6 is a flowchart conceptually showing a transmitter ID transmission program executed by the computer of the portable terminal shown in FIG. FIGS. 7A to 7F are conceptual diagrams showing a plurality of types of reception areas to explain a part of the transmitter ID program shown in FIG. 6 for processing a signal received from the transmitter. 5 is a time chart for explaining a signal processing algorithm. FIG. 8 is a functional block diagram showing the management server shown in FIG. FIG. 9 is another functional block diagram showing the management server shown in FIG. 1, and particularly shows a software configuration of the management server. FIG. 10 is a diagram conceptually showing the relationship (conversion table) between the transmitter ID, the spatial coordinate value, and the floor number stored in advance in the memory of the management server shown in FIG. 9 in a table format. FIG. 11A is a diagram conceptually showing an example of a time history of a plurality of reception points temporarily stored in the memory of the management server shown in FIG. 9 in a table format, and FIG. FIG. 12 is a diagram conceptually showing an example of a time history of a plurality of movement vectors converted from the time histories of a plurality of reception points shown in FIG. FIG. 12A is a conceptual diagram showing the time histories of the plurality of receiving points shown in FIG. 11A as a sequence of receiving points in a three-dimensional space, and FIG. It is a conceptual diagram showing the time history of the some moving vector shown as a moving vector sequence in a three-dimensional space. FIG. 13A is a diagram illustrating three movement vector sequences acquired for the same building on an xy plane, and FIG. 13B is a diagram illustrating three movement vector sequences illustrated in FIG. FIG. 13C is a diagram in which the overlapping portion of the above is expressed on the xy plane as a successful escape route of the preceding evacuation phase 1, and FIG. 13C is a diagram in which the succeeding escape route of the succeeding evacuation phase 2 is expressed on the xy plane. It is. FIG. 14A conceptually shows the relationship (evacuation guidance information) between the successful escape route and the degree of escape difficulty temporarily stored for each floor in the memory of the management server shown in FIG. 9 in the evacuation phase 1. FIG. 14B is a diagram conceptually showing the relationship (evacuation guidance information) in the evacuation phase 2 in a tabular format. FIG. 15 is a flowchart conceptually showing a reception processing program executed by the computer of the management server shown in FIG. FIG. 16 is a flowchart conceptually showing an evacuation route estimation program executed by the computer of the management server shown in FIG. FIG. 17 is a flowchart conceptually showing a successful escape route estimating program executed by the computer of the management server shown in FIG. FIG. 18 is a flowchart conceptually showing an escape difficulty estimation program executed by the computer of the management server shown in FIG. FIG. 19 is a flowchart conceptually showing a transmission processing program executed by the computer of the management server shown in FIG.

  Hereinafter, one of a plurality of more specific and exemplary embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an overall system diagram showing a disaster escape route guidance system (hereinafter, simply referred to as “system”) 10 according to an embodiment of the present invention. The system 10 relates to a technique for analyzing a moving route or a flow of a plurality of people in a closed space, and more specifically, guides a route for a plurality of people who want to escape from the building 12 safely in a disaster. About technology.

<About the configuration of the entire system>

  Schematically, as shown in FIG. 1, the system 10 includes a plurality of transmitters 30 which are spatially discretely installed in a building 12 and a plurality of mobile terminals carried by a plurality of escape applicants. (Example of the “communication terminal”) 90 and a management server 50 operated and managed by a management center 40 located at a remote place and capable of communicating with a plurality of mobile terminals 90.

  The plurality of transmitters 30 and the plurality of mobile terminals 90 are unidirectionally connected by a short-range wireless communication method, while the plurality of mobile terminals 90 and the management server 50 are connected via a global network such as the Internet. , And bidirectionally connected by a long-distance wireless communication system.

<About the building>

  As shown in FIG. 2A, an example of the building 12 is a two-story building. As shown in FIG. 2B, a first entrance 14 and a second entrance 15 and a first stair 16 and a second stair 17 are present on the first floor portion 13 of the building 20. In the second floor portion 20 of the building 20, there are four rooms 21, 22, 23, 24, a first corridor 25 and a second corridor 26.

  Further, as shown in FIG. 2B, a fire alarm 28 is installed at a plurality of places in the building 12, and a disaster monitoring system 29 is installed outside the building 12. The fire alarm 28 detects a fire in the building 12, while the disaster monitoring system 29 detects a fire outside the building 12 (for example, a fire in an outer wall, a garden, a neighboring land, or the like).

  As shown in FIG. 1, a plurality of transmitters 30 are installed in the building 12. As illustrated in FIG. 3, a plurality of transmitters 30 are spatially discretely installed on a vertical wall of a room (for example, the room 22) in the building 12. The transmitters 30 are provided in a plurality of passages (spaces in the entrances 14 and 15; corridors 25 and 26; corridors 25 and 26; Space, etc.). Each transmitter 30 may be installed on a vertical wall, on a ceiling, on a floor, or suspended from the ceiling.

  Furthermore, some transmitters 30 are installed on the outer walls of each entrance 14,15. These transmitters 30 can be used to confirm that the escape applicant has surely escaped from one of the entrances 14 and 15.

<About the transmitter>

  As shown in FIG. 4, each transmitter 30 emits a unique signal, which represents a unique transmitter ID. Since it is known where each transmitter 30 is installed in the building 12, the installation position, that is, the spatial coordinate value (x, y, z) is assigned to the transmitter ID in advance.

  First, conceptually, the transmitter 30 is a contactless or contact (proximity) communication device that locally transmits an identification signal capable of identifying a unique transmitter ID.

  Next, the operation method will be described. The transmitter 30 transmits the unique identification signal actively, locally, and permanently as long as the supply power is not insufficient without requiring an external trigger signal. I do.

  The transmitter 30 is a device that is generally known by a name such as a beacon device that transmits a beacon signal as an identification signal and a wireless beacon. In one example, the transmitter 30 generates an identification signal representing the corresponding transmitter ID by modulating the original signal, and converts the generated identification signal into an IR signal, a Bluetooth (registered trademark) signal, an NFC (Near field communication) Locally transmitted as a signal.

  Next, the hardware configuration will be described with reference to FIG. 4. The transmitter 30 is mainly configured by a computer 104 having a processor 100 and a memory 102 storing a plurality of applications executed by the processor 100. I have.

  The transmitter 30 further has a replaceable disposable battery 106 as a power source. Instead of the battery 106, a rechargeable battery can be employed, or a commercial power supply or a solar battery as an external power supply can be employed.

  When a solar cell is used as an external power source, surplus electrical energy generated by using the solar cell during the day is stored in a battery, and at night, the battery energy is extracted from the battery and the transmitter 30 is operated. You may let it.

  The transmitter 30 further includes a transmitter 108 that generates and transmits an identification signal. The transmitting unit 108 is operated by the battery 106 and controlled by the controller 110. The controller 110 is controlled by the computer 100.

  In describing the software configuration of the transmitter 30, the processor 100 outputs a signal for modulating an original signal (for example, a carrier signal) to the controller 110 so that the transmitter ID is reflected. The controller 110 controls the transmitting unit 108, and as a result, the transmitting unit 108 generates an identification signal to be transmitted this time. Thereafter, the generated identification signal is transmitted from transmitting section 108.

<About mobile terminals>

  The mobile terminal 90 of the escape applicant (user) is a device carried by the user and having a wireless communication function, such as a mobile phone, a smartphone, a laptop computer, a tablet computer, and a PDA. Further, the mobile terminal 90 is an example of a user's communication terminal, and the communication terminal may not be carried by the user, for example, may be a vehicle-mounted communication terminal.

  Next, a hardware configuration of the mobile terminal 90 will be described with reference to FIG. 5. The mobile terminal 90 includes a processor 130 and a memory that stores a plurality of programs (also referred to as “applications”) executed by the processor 130. The computer 134 mainly includes a computer 134.

  The mobile terminal 90 further includes a display unit (for example, a liquid crystal display) 136 for displaying information, a receiving unit 138 for receiving signals from the transmitter 30 and the management server 50, and generating and managing the signals. And a transmission unit 140 for transmitting to the server 50. Here, the receiving unit 138 is a part that senses an electromagnetic wave from the transmitter 27 of the sensor 26 and a part that senses an identification signal from the transmitter 30.

  The mobile terminal 90 further has an input unit 150 for inputting data and commands from the user. The input unit 150 includes, for example, an operation unit that can be operated by a user to input desired information (for example, commands, data, and the like) to the mobile terminal 90. The operation unit includes a touch screen that displays an icon (for example, a virtual button) that can be operated by the user, a physical operation unit (for example, a keyboard, a keypad, a button, and the like) that can be operated by the user, and a sound. There are, but are not limited to, microphones that sense.

  The mobile terminal 90 further has a GPS (satellite positioning system) receiver 152. As is well known, the GPS receiver 152 receives a plurality of GPS signals from a plurality of GPS satellites, and determines the position (latitude, longitude, and altitude) of the GPS receiver 152 on the earth based on the GPS signals. Measure by triangulation.

  The mobile terminal 90 further includes an acceleration sensor 154 for detecting its own acceleration. Since the acceleration sensor 154 is mounted on the mobile terminal 90, the acceleration sensor 154 vibrates integrally with the mobile terminal 90, and as a result, the acceleration acting on the acceleration sensor 154 itself is transmitted to the mobile terminal 90 and the user carrying it. Is detected as equivalent to the acceleration acting on.

  Here, one function of the user's portable terminal 90 will be described in relation to the transmitter 30. The portable terminal 90 transmits the identification signal from the transmitter 30 to the computer of the portable terminal 90. When a certain program installed in advance, that is, a dedicated application for transmitter processing (hereinafter, referred to as “transmitter application”) is started (login), the received identification signal is demodulated, whereby Decrypt the transmitter ID. The mobile terminal 90 further transmits the decrypted transmitter ID to the management server 50 together with the user ID or the terminal ID (device ID).

  Furthermore, when the portable terminal 90 activates the transmitter application while receiving the identification signal from the transmitter 30, the portable terminal 90 performs the identification based on the received identification signal (for example, the strength of the identification signal). The distance between the position of the transmitter 30 when the signal is transmitted and the position of the portable terminal 90 when the identification signal is received is also measured.

  That is, based on the identification signal received from the transmitter 30, the portable terminal 90 transmits the transmitter ID unique to the vehicle compartment 22 where the transmitter 30 is actually installed, and the distance to the transmitter 30 at that time. To acquire both.

<Receiver range of transmitter>

  Apparently, two types of reception areas are assigned to the transmitter 30. These are a receivable area and an effective reception area (hereinafter, also referred to as “reception range” or “reception area”).

  Each of these areas is generally defined by one circle centered on the installation position of the transmitter 30. Some examples of coverage areas are shown in FIGS. 7 (a) and 7 (d).

  The receivable area of the transmitter 30 has a maximum reception radius (for example, about 50 m), while the effective reception area has an effective reception radius (for example, any value within a range from 0 m to about 50 m). . While the maximum reception radius is a constant value, the effective reception radius is a variable value that can be set at any time by the mobile terminal 90 as described later.

  The receivable area is an area in which the identification signal from the transmitter 30 can be reached when the power supply of the transmitter 30 is normal, that is, the mobile terminal 90 receives the identification signal as long as the area is within the area. Means possible areas.

  On the other hand, the effective reception area has an effective reception radius smaller than the maximum reception radius of the receivable area. While the maximum receiving radius cannot be set arbitrarily, the effective receiving radius can be set arbitrarily in the portable terminal 90 by software.

  In other words, the maximum reception radius means a reception limit determined by hardware, while the effective reception radius means a reception limit determined by software.

  As described above, the portable terminal 90 measures the distance to the transmitter 30 based on the strength of the identification signal received by the portable terminal 90. The distance measurement may or may not exceed the effective reception radius. When the distance measurement value does not exceed the effective reception radius, the mobile terminal 90 is within the effective reception area. On the other hand, when the distance measurement value exceeds the reception effective radius, the mobile terminal 90 does not. Exists in the receivable area but does not exist in the effective reception area.

  In the present embodiment, the reception range of the transmitter 30 is set to be, for example, a circular area having a radius of about 1 m to 5 m. That is, the effective reception radius used in the portable terminal 90 is set to a fixed value within about 1 m-5 m.

  Although the effective reception radius does not change in the mobile terminal 90, actually, even if the distance from the mobile terminal 90 is the same, the reception strength of the identification signal fluctuates due to disturbance or the like. Therefore, apparently, the radius of the reception area fluctuates as illustrated in FIGS. 7A and 7D. Here, the apparent reception area means a reception area having the effective reception radius when the fluctuation error of the reception intensity is expressed as the fluctuation of the effective reception radius.

  FIG. 6 is a flowchart conceptually illustrating a transmitter ID transmission program executed by the computer 134 of the mobile terminal 90. FIGS. 7A to 7F show a plurality of types of transmitter ID programs shown in FIG. 6 in order to explain a part of the transmitter terminal 90 that processes a signal received from the transmitter 30. 3A and 3B are a conceptual diagram showing a reception area and a time chart for explaining a signal processing algorithm.

  Prior to the description of the transmitter ID transmission program, the signal processing algorithm will be described.

  FIGS. 7A to 7C show three transmitters 30 arranged in a line when the apparent reception area matches the normal reception area (the reception area faithfully reflecting the effective reception radius). 5 shows a state in which a transmitter ID is extracted from a signal received from a user.

  In the present embodiment, the intervals between the transmitters 30 are set so that, for example, the regular reception areas do not overlap each other. For example, when the effective reception radius is set to 2 m, the interval between the transmitters is set to a distance longer than 2 m × 2, for example, 5 m.

  In the scenario shown in FIG. 7A, when the user walks the three transmitters A, B, and C from the left side to the right side at a constant speed while holding the portable terminal 90, as shown in FIG. , So that the transmitter ID represented by the signal received by the portable terminal 90 (hereinafter simply referred to as “received signal”) does not pass through the overlapping period, but rather passes through the blank period. Changes with.

  On the other hand, in the present embodiment, as shown in FIG. 7C, signal processing is performed so that a blank period of the transmitter ID does not occur, that is, the transmitter ID changes seamlessly. Specifically, for example, when the reception signal from the transmitter 30 disappears, the transmitter ID represented by the reception signal that was present immediately before is regarded as the current transmitter ID. As a result, a blank period does not need to appear between the reception period of one transmitter ID and the reception period of another transmitter ID.

  In the present embodiment, the portable terminal 90 transmits the transmitter ID to the management server 50 every time the transmitter ID is switched. Therefore, the management server 50 sets the reception time every time the transmitter ID is switched. Will be measured. That is, the portable terminal 90 does not always transmit the transmitter ID to the management server 50 regardless of whether or not the transmitter ID is switched. Thereby, the transmission load of the mobile terminal 90 is reduced, and at the same time, the reception load of the management server 50 is reduced.

  On the other hand, FIGS. 7 (d) to 7 (f) show that when the apparent reception area does not match the normal reception area, and when the apparent reception area is larger than the normal reception area and overlaps with the adjacent reception area, A state where a transmitter ID is extracted from signals received from three transmitters 30 arranged in a line is shown.

  In the scenario shown in FIG. 7D, when the user walks the three transmitters A, B, and C from left to right at a constant speed while holding the portable terminal 90, as shown in FIG. The transmitter ID represented by the signal received by the portable terminal 90 changes with time after a period of overlap, that is, a period in which interference occurs.

  On the other hand, in the present embodiment, as shown in FIG. 7F, the signal processing is performed so that the overlap period of the transmitter ID does not occur, that is, so that only one transmitter ID always exists. Is done. Specifically, for example, when interference of the received signal occurs, only the new transmitter ID is made valid, and the old transmitter ID is made invalid. As a result, an overlap period does not need to appear between the reception period of one transmitter ID and the reception period of another transmitter ID.

  Here, the transmitter ID transmission program will be described with reference to FIG.

  When the portable terminal 90 is turned on, this program is automatically executed unconditionally, for example, started in the background, or 2) the portable terminal 90 performs positioning using the GPS. The execution is automatically started on the condition that the mobile terminal 90 detects that the current position matches the building 12 or 3) the mobile terminal 90 issues a start command from the management server 50 (the management server 50 transmits the building 12 When the management server 50 transmits a start command in response to the detection of the occurrence of a disaster, the execution is automatically started in response to the reception, or 4) a start command from the user. The execution is started manually in response to.

  In any case, this program is repeatedly executed by the computer 134 of the mobile terminal 90. At the time of each execution, first, in step S61, it is determined whether or not the receiving unit 138 has received a signal from any of the transmitters 30. If not, in step S62, it is determined whether or not the previous transmitter ID (i-1) acquired from the transmitter 30 at the time of the previous execution of this program was 0. If this determination is YES, in step S63, the current transmitter ID (i) is set to 0, whereby the transmitter ID is held at 0. This is the end of the current execution of this program.

  On the other hand, if the determination in step S62 is NO, in step S64, the current transmitter ID (i) is set to the same as the previous transmitter ID (i-1). As a result, the transmitter ID is held at the previous transmitter ID (i-1), and the occurrence of a blank period of the transmitter ID is prevented.

  Thereafter, in step S69, it is determined whether the current transmitter ID (i) is different from the previous transmitter ID (i-1), that is, whether the transmitter ID has shifted. This time, since the shift does not exist, the determination is NO, and the step S70 of transmitting to the management server 50 is skipped. This is the end of the current execution of this program.

  On the other hand, when the receiving unit 138 receives a signal from any of the transmitters 30, the determination in step S61 is YES, and then in step S66, the current transmitter ID ( i) is obtained. Thereafter, in step S67, it is determined whether or not a plurality of transmitter IDs (i) are present this time because the receiving unit 138 has received signals from the plurality of transmitters 30 at the same time. In this case, if it is assumed that only one transmitter ID (i) exists, the determination is NO, and then, in step S68, the one transmitter ID (i) is properly adopted.

  Thereafter, in step S65, it is determined whether the current transmitter ID (i) is different from the previous transmitter ID (i-1), that is, whether the transmitter ID has shifted. This time, assuming that the shift does not exist, the determination is NO, and step S70 is skipped. This is the end of the current execution of this program.

  On the other hand, assuming that the shift exists this time, the determination becomes YES, and in step S70, the current transmitter ID (i) is the user ID (i.e., the identification information of the user of the mobile communication terminal 90). It may be transmitted to the management server 50 together with the terminal ID of the portable communication terminal 90). This is the end of the current execution of this program.

  On the other hand, this time, assuming that the receiving unit 138 receives signals from the plurality of transmitters 30 at the same time and there are a plurality of transmitter IDs (i), the determination in step S67 is YES, and in step S70, Of the transmitter ID (i) (usually, two transmitter IDs (i)), the one different from the previous transmitter ID (i-1) is the current transmitter ID (i). Adopted as As a result, the occurrence of the overlap period of the transmitter ID is prevented. Thereafter, the process proceeds to step S65.

<About the management server>

  Next, to explain the hardware configuration of the management server 50, FIG. 8 shows a functional block diagram of the management server 50. The management server 50 is mainly configured by a computer 164 having a processor 160 and a memory 162 for storing a plurality of applications executed by the processor 160.

  The management server 50 further includes a display unit (for example, a liquid crystal display) 166 for displaying information, a receiving unit 168 for receiving a signal from the mobile terminal 90, and generating a signal and transmitting the signal to the mobile terminal 90. And a clock 172. The management server 50 does not directly receive from the transmitter 30, but in fact, performs the reception via the portable terminal 90.

  FIG. 9 is a functional block diagram showing another software configuration of the management server 50. In order to generate and spread the evacuation guidance information, the management server 50 searches for an actual evacuation route for each of the escape applicants for each floor of the building 12 and sequentially and repeatedly in real time. Of a plurality of evacuation routes estimated to be used individually by a plurality of escape applicants, a portion common to each other in place is estimated as a successful escape route commonly used by the escape applicants.

  In order to realize this function, as shown in FIG. 9, the management server 50 includes a receiving unit 200 that receives the transmitter ID and the user ID from the transmitting unit 140 of each portable terminal 90, And a storage unit 202 that stores the information in the memory 162 in association with the reception time at which the management server 50 has received it from each mobile terminal 90 and the user ID.

  As shown in FIG. 9, the management server 50 further determines each escape request according to a predetermined relationship (conversion table) between the transmitter ID and the spatial coordinate values stored in the memory 162. For each user, the time history of the plurality of transmitter IDs stored in the memory 162 is converted into the time history of a plurality of spatial coordinate values indicating the installation positions (reception points) of the plurality of transmitters corresponding thereto, and It has an evacuation route estimating unit 204 for estimating the evacuation route actually used by each escape applicant from the time history of the plurality of spatial coordinate values for each escape applicant.

  FIG. 10 conceptually shows the relationship (conversion table). According to this relationship, a spatial position where one transmitter 30 having one spatial coordinate value and assigned with the transmitter ID is installed in the building 12 is obtained from one transmitter ID. The number of floors where the transmitter 30 is installed in the building 12 can be obtained.

  Therefore, by referring to this conversion table, the time histories of the plurality of transmitter IDs can be converted to the time histories of a plurality of spatial coordinate values representing the installation positions of the corresponding plurality of transmitters.

  FIG. 11A shows an example of the time histories of a plurality of spatial coordinate values temporarily stored in the memory 162 for each escape applicant, that is, an example of the time histories of a plurality of receiving points. FIG. 11B shows, for each escape applicant, the time histories (continuous data) of a plurality of movement vectors converted from the time histories (discrete data) of the plurality of reception points shown in FIG. That is, the evacuation route estimated to have actually been used by the escape applicant is represented as data.

  FIG. 12A illustrates the time histories of the plurality of reception points illustrated in FIG. 11A as a reception point sequence (discrete data) in a three-dimensional space. In the reception point sequence shown in this figure, a partial reception point sequence corresponding to the first corridor 25, a partial reception point sequence corresponding to the first stairs 16, and a partial reception point sequence corresponding to the first entrance 14 are one line. In order.

  FIG. 12B shows the time histories of the plurality of movement vectors shown in FIG. 11B as a movement vector sequence (continuous data) in a three-dimensional space. In the movement vector sequence shown in this figure, a partial movement vector sequence corresponding to the first corridor 25, a partial movement vector sequence corresponding to the first stairs 16, and a partial movement vector sequence corresponding to the first entrance 14 are one line. In order.

  As illustrated in FIG. 9, the management server 50 further determines, among the plurality of evacuation routes estimated to be individually used by a plurality of escape applicants, portions common to each other in terms of location, the escape applicants. Has a successful escape route estimating unit 206 for estimating as a commonly used successful escape route.

  FIG. 13A illustrates three exemplary movement vector sequences acquired for the building 12 on the xy plane for convenience of description. In FIG. 13B, the overlapping part of the three movement vector sequences shown in FIG. 13A is expressed on the xy plane as a successful escape route of the preceding evacuation phase 1 (a certain time t1). Have been. The exemplary successful exit route has a segment corresponding to the first corridor 25, a segment corresponding to the first staircase 16, and a segment corresponding to the first entrance 14. FIG. 13C illustrates an exemplary successful escape route in the subsequent evacuation phase 2 (time t2 after time t1) on the xy plane. The exemplary successful escape route has a segment corresponding to the first corridor 25, a segment corresponding to the second staircase 17, and a segment corresponding to the second entrance 15.

  As described above, the successful escape route may change every moment according to the progress of the damage or damage to the building 12.

  As shown in FIG. 9, the management server 50 further stores, for each escape applicant, a plurality of reception times stored in the memory 162 in association with the plurality of transmitters 30 corresponding to the estimated successful escape route. From the time difference between, calculate the moving speed of each escape applicant along the successful escape route, and based on the calculated moving speed, determine the degree of difficulty when escaping from the building using the successful escape route. It has an escape difficulty estimating unit 208 for estimating.

  As shown in FIG. 9, the management server 50 further distributes (broadcasts) the evacuation guidance information to the plurality of portable terminals 90 of the other plurality of escape applicants, thereby transmitting the evacuation guidance information to a plurality of persons. There is a transmission unit 210 (including a successful escape route distribution unit) that is shared among escape applicants.

  As shown in FIG. 14, the “evacuation guidance information” includes a successful escape route estimated for each floor and an escape difficulty estimated for each escape route.

  Therefore, the escape applicant who has obtained the evacuation guidance information is recommended to pass through which place to escape from the building 12 from the floor where he or she is now, and how much preparation and It is possible to know from the evacuation guidance information whether the user needs to be prepared or how crowded the person is.

  FIG. 15 conceptually illustrates a reception processing program executed by the computer 164 of the management server 50 in a flowchart.

  This program is repeatedly executed by the computer 134 of the mobile terminal 90. In each execution, first, in step S1501, it is determined whether the receiving unit 168 has received a signal (transmitter ID and user ID) from any of the mobile terminals 90. If there is no reception, the determination is NO, and the current execution of this program ends.

  On the other hand, if there is a reception, the determination in step S1501 is YES, and the current time is measured as the reception time using the clock 172 in step S1502. Subsequently, in step S1503, a user ID is extracted from the received signal. Thereafter, in step S1504, a transmitter ID is extracted from the received signal.

  Subsequently, in step S1505, the extracted transmitter ID is converted into a corresponding spatial coordinate value (data representing the position of the receiving point) by referring to the conversion table illustrated in FIG. Then, in step S1506, as illustrated in FIG. 11A, the measured reception time, the extracted transmitter ID, and the spatial coordinate values acquired by the conversion are stored in the memory 162. Stored in association with each other. This is the end of the current execution of this program.

  FIG. 16 conceptually shows a flowchart of an evacuation route estimation program executed by the computer 164 of the management server 50.

  This program is repeatedly executed by the computer 134 of the mobile terminal 90. At the time of each execution, first, in step S1601, as shown in FIG. 9, at least one of the fire alarm 28 and the disaster monitoring system 29 is monitored to determine whether a disaster has occurred in the building 12. Is done. If no disaster occurs, the determination is NO, and the current execution of this program ends.

  On the other hand, when a disaster occurs in the building 12, the determination in step S1601 is YES, and in step S1602, a plurality of escape applicants (for example, as a plurality of persons related to the building 12, Of the registered persons), one person (execution target person) to be executed this time of this program is selected as a current target escape applicant.

  Subsequently, in step S1603, as shown in FIG. 11A, by reading data associated with the current target escape applicant from the memory 162, as shown in FIG. , A time history in which the receiving points are arranged in a line in chronological order, that is, a receiving point sequence is obtained.

  Then, in step S1604, the acquired reception point sequence is converted into a movement vector sequence as shown in FIG. 11 (b) and FIG. 12 (b). The movement vector sequence is data for estimating the evacuation route.

  Since this program is executed periodically, evacuation of each escape applicant progresses with time, and as the evacuation route becomes gradually longer, the movement vector sequence becomes longer.

  To specifically and exemplify an algorithm for converting the reception point sequence into the movement vector sequence, in the example shown in FIG. 11, for example, the space coordinate value P1 at time t1 and the subsequent time t2 A first movement vector having P1 as a start point and P2 as an end point is generated from the spatial coordinate values P2 at the time of. Next, a second movement vector having P2 as a start point and P3 as an end point is generated from the spatial coordinate value P2 at time t2 and the subsequent spatial coordinate value P3 at time t3.

  In this example, the spatial coordinate value P2 is shared by the first and second motion vectors as a connection point between the two. As a result, the discrete data shown in FIG. 12A is converted into continuous data shown in FIG. The conversion process from the reception point sequence to the movement vector sequence can be understood as an interpolation process of the reception point sequence.

  Subsequently, in step S1605, it is determined whether all the escape applicants have been selected as execution targets. If there is an escape applicant who has not yet been selected as the execution target person, the determination is NO, and in step S1606, another escape applicant is selected as the next execution target person. Thereafter, the process returns to step S1603.

  When the execution of steps S1603-S1606 is repeated for all the escape applicants, the determination in step S1605 becomes YES, and in step S1607, it is determined that the estimation of the actual evacuation route has been completed for all the escape applicants (for all). Is done.

  FIG. 17 conceptually shows a flowchart of a successful escape route estimation program executed by the computer 164 of the management server 50.

  This program is repeatedly executed by the computer 134 of the mobile terminal 90. In each execution, first, in step S1701, it is determined whether the evacuation route estimation has been completed for all the members. If not completed, the determination is NO, and the current execution of this program ends.

  On the other hand, if the estimation is completed, the determination in step S1701 becomes YES, and in step S1702, for each evacuation route of each escape applicant, each escape applicant uses the evacuation route to escape. It is determined whether it was successful. Specifically, for example, it is determined whether each escape applicant has escaped from the building 12 through any of the entrances 14 and 15, for example, a plurality of transmissions stored in the memory 162 for each escape applicant. It is determined whether or not the transmitter ID corresponding to the transmitter 30 installed outside the entrances 14 and 15 exists in the transmitter ID.

  Subsequently, in step S1703, among the plurality of evacuation routes of the plurality of escape applicants stored in the memory 162, the one determined to have been successfully escaped is selected as the plurality of target evacuation routes.

  After that, in step S1704, an overlapping portion (when there are a plurality of overlapping portions, each of them) is extracted as a successful escape route from the selected plurality of target evacuation routes.

  An example of an algorithm for extracting the overlapping portion will be described.

  In the first step, a plurality of movement vector sequences representing a plurality of target evacuation routes are respectively stored in a three-dimensional orthogonal coordinate system (x axis: vertical axis, y axis: horizontal axis, z axis: height axis) fixed to the building 12. ) Is converted into a group of a plurality of dots. Each dot is represented by a three-dimensional coordinate value (x, y, z). In other words, the vector data expressing one vector from the start point and the end point indicates the position of each dot (pixel) in the case where a continuous figure representing the vector is expressed as a group of a plurality of dots (pixels). It is converted into bitmap data to represent.

  In the second step, among the plurality of dots obtained in this manner, three-dimensional coordinate values (three-dimensional coordinates whose error value is equal to or less than an allowable value) substantially coincide with each other among a plurality of motion vector sequences for all members. (Coordinate values) are extracted.

  In the third step, the plurality of dots thus extracted are combined with one straight line segment (one straight line) or one straight line segment line (1 line) composed of a plurality of straight line segments connected in series to each other. (Book line). One straight line segment or one line segment line represents a successful escape route.

  In the third step, a part passing through the thus obtained successful escape route is extracted from a plurality of parts of the building 12. For example, in the example of the successful escape route shown in FIG. 13B, the first entrance 14 is selected as a term that simply represents the successful escape route. In the example of the successful escape route shown in FIG. 13C, the second entrance 15 is selected as a term that simply represents the successful escape route.

  When step S1704 ends, in step S1705, the thus obtained successful escape route is stored in the memory 162 in association with the corresponding floor. For example, the successful escape route shown in FIG. 13B is formed by using the transmitter 30 installed on the first floor portion 13 and the transmitter 30 installed on the second floor portion 20, so that the first escape floor is It is respectively associated with the second floor. This is the end of the current execution of this program.

  Another example of an algorithm for extracting an overlapping portion will be described.

  In the memory 162, the same transmitter code shared by all or almost all is searched for as a shared transmitter code, and the searched plurality of shared transmitter codes are sorted in reception time order (for example, for one escape applicant). , Generating a time history of a plurality of shared transmitter codes with reference to the plurality of reception times of the communication device, thereby defining a successful escape route.

  FIG. 18 conceptually shows a flowchart of the escape difficulty estimating program executed by the computer 164 of the management server 50.

  This program is repeatedly executed by the computer 134 of the mobile terminal 90. At the time of each execution, first, in step S1801, the movement speed when the escape applicant moves along each of the plurality of movement vectors belonging to the latest successful escape route is calculated as the individual movement speed.

  The algorithm for calculating the individual moving speed will be specifically described using the successful escape route shown in FIG. 13B as an example. The successful escape route is defined by six movement vectors. As shown in FIG. 13A, the movement vector on the most upstream side is shared between the escape applicant A, the escape applicant B, and the escape applicant C. However, the moving speeds of the escape applicants when moving along the movement vector do not always match each other.

  For example, for the escape applicant A, the most upstream movement vector is defined by the start point coordinate value P3 obtained at the reception time t3 and the start point coordinate value P4 obtained at the reception time t4. The value obtained by dividing the distance between the start point and the end point (= the length of the line segment P3P4) by the difference between the reception times (= t4−t3) is the individual movement speed for this movement vector. Similarly, for the person B who wants to escape, the individual movement speed is calculated for the same movement vector. Similarly, the individual moving speed of the person C who wants to escape is calculated for the same moving vector.

  Regarding the movement vector on the most upstream side, the average value of these three individual movement speeds is the individual movement speed. Similarly, the individual moving speed is calculated for each of the other moving vectors.

  Subsequently, in step S1802, a composite value of a plurality of individual traveling speeds calculated respectively for a plurality of traveling vectors belonging to the latest successful escape route is calculated as a composite traveling speed. The combined moving speed can be an unweighted average value or a weighted average value.

  Thereafter, in step S1803, the difficulty level when the escape applicant has escaped using the latest successful escape route is estimated based on the calculated combined movement speed.

  For example, if the calculated value of the combined moving speed is equal to or higher than the reference value, it is possible that escape has been performed smoothly, and it is estimated that the difficulty level at the time of escape was low. On the other hand, if the calculated value of the combined moving speed is lower than the reference value, it is possible that escape has not been performed smoothly, and it is estimated that the degree of difficulty at the time of escape has been high.

  Subsequently, in step S1804, the estimated difficulty level is stored in the memory 162 in association with the successful escape route. This is the end of the current execution of this program.

  FIG. 19 is a flowchart conceptually showing a transmission processing program executed by the computer 164 of the management server 50.

  This program is repeatedly executed by the computer 134 of the mobile terminal 90. At the time of each execution, first, in step S1901, successful escape route data indicating the latest successful escape route is read from the memory 162. Next, in step S1902, escape difficulty level data indicating the latest escape difficulty level is read from the memory 162. Subsequently, in step S1903, evacuation guidance information is generated from the read successful escape route data and escape difficulty data. Then, in step S1904, the generated evacuation guidance information is transmitted from the transmission unit 170 to the mobile terminals 90 of all the escape applicants. This is the end of the current execution of this program.

  By the way, according to this system 10, if a fire occurs in the building 12, before the fire brigade arrives at the building 12, a plurality of escape applicants staying in the building 12 can use the building by themselves. Activities to escape 12 are supported.

  When firefighters arrive at building 12, the site of the fire, they strive to search for and rescue any surviving survivors in building 12. At this time, a firefighter may need to enter a dangerous location within the building 12.

  At this time, the fire brigade member precedes a drone capable of remote operation and autonomous navigation equipped with a camera and a communication device, and has the drone guide the user. In other words, a hoverable drone flies in front of the firefighter, shoots the scene with the drone's camera, and transmits the image to the firefighter's mobile terminal. As a result, firefighters can remotely photograph the site, search for survivors and secure a safe course with reduced risk.

  It is to be noted that, in the above-described several embodiments, the present invention is applied to a use of supporting escape from a building at the time of a disaster, but can be applied to other uses.

  For example, according to the present invention, in a closed space, a portion common to some places is extracted from a plurality of travel routes estimated to be used individually by a plurality of users (users of the mobile terminal 90). The present invention can be applied to an application in which it is presumed that an object of interest commonly indicated by the plurality of users exists at the same position as the extracted portion or a position near the extracted portion.

  In this aspect, an object of interest shared by a plurality of users is found, and if the found result is used, for example, when the object is a product, the marketing activity of the product is activated. it can.

  Here, examples of the "closed space" include a store where a plurality of products are displayed, an exhibition room where a plurality of works are displayed, a museum, a museum, a library, and the like.

  The present invention further provides, in a closed space, for each user, a plurality of transmission times or reception times stored in the memory in association with a plurality of transmitter IDs corresponding to the estimated travel route. From the time difference, the present invention can be applied to a use in which a portion of the travel route where the user's travel speed is lower than a reference value is extracted as a bottleneck.

  In this aspect, if a bottleneck in a closed space is extracted, it is possible to support the improvement of the flow of people, the arrangement of departments, and the passage so that the bottleneck is reduced or eliminated.

  Here, the “closed space” is, for example, an entity (eg, a company, a factory, a hospital, a government office, a production site, etc.) in which a plurality of departments that cooperate with each other under an organization exist in a spatially discrete manner. There is.

  In addition, in this embodiment, all or a part of the processing executed in the mobile terminal 90 may be executed in the management server 50 instead, or conversely, the processing is executed in the management server 50. All or part of the processing may be executed in the mobile terminal 90 instead. Which device performs the process to be performed is usually determined by the circumstances at that time, for example, the amount and type of data to be handled, the processing speed and storage capacity of each device, and the like. .

  As described above, some of the exemplary embodiments of the present invention have been described in detail with reference to the drawings. However, these are merely examples, and the embodiments described in the “Summary of the Invention” section may be used by those skilled in the art. The present invention can be implemented in other forms in which various modifications and improvements are made based on knowledge.

Claims (7)

A system that guides the route for multiple escape applicants to escape safely from a building during a disaster,
A plurality of transmitters spatially discretely installed in the building, wherein each transmitter transmits an identification signal representing a unique transmitter ID;
A plurality of communication terminals carried by a plurality of escape applicants, each of which can receive an identification signal from each transmitter by a short-range wireless communication method,
A management server capable of communicating with the plurality of communication terminals,
The building has a plurality of floors,
Upon receiving a signal from any of the transmitters, the communication terminal of each escape applicant receives a transmitter ID represented by the signal and a terminal / user ID which is identification information of the communication terminal or identification information of the user. A transmission unit for transmitting to the management server,
The management server,
A receiving unit that receives the transmitter ID and the terminal / user ID from each communication terminal;
A storage unit that stores the received transmitter ID in a memory in association with the transmission time transmitted by each communication terminal to the management server or the reception time received by the management server from each communication terminal and the terminal / user ID. When,
According to a predetermined relationship between the transmitter ID and the spatial coordinate values stored in the memory, for each escape applicant, the time of the plurality of transmitter IDs stored in the memory The history is converted into a time history of a plurality of spatial coordinate values representing the installation positions of the plurality of transmitters corresponding thereto, and for each escape applicant, from the time history of the plurality of spatial coordinate values, An evacuation route estimator for estimating the evacuation route actually used;
For each floor of the building, a plurality of evacuation routes presumed to have been individually used by a plurality of escape applicants. A successful escape route estimating unit for estimating the escape route;
Based on a time difference between a plurality of transmission times or a plurality of reception times stored in the memory in association with a plurality of transmitter IDs corresponding to the estimated successful escape route, a plurality of persons wishing to escape along the same successful escape route are determined. Based on the plurality of traveling speeds calculated for each successful escape route, the degree of difficulty in escaping from the building using the successful escape route for each successful escape route. An escape difficulty estimator for estimating the escape difficulty,
Evacuation guidance information is generated based on the successful escape route estimated for each floor and the degree of escape difficulty estimated for each successful escape route, and the evacuation guidance information is communicated to a plurality of other escape candidates. An evacuation guidance information distribution unit that distributes the evacuation guidance information among a plurality of escape applicants, thereby distributing the evacuation guidance information to a terminal. Each spatial coordinate value is defined three-dimensionally in a three-dimensional rectangular coordinate system fixed to the building,
The evacuation route estimating unit calculates, for each escape applicant, a time history of the plurality of spatial coordinate values, a moving vector in which a plurality of moving vectors are arranged in a line in a three-dimensional orthogonal coordinate system fixed to the building. Converted into a column, the evacuation route is defined as the movement vector column,
The successful escape route estimating unit converts each movement vector sequence into a group of a plurality of dots in a three-dimensional rectangular coordinate system fixed to the building, and among the dots, the plurality of dots regarding the plurality of escape applicants. A plurality of movement vector sequences that substantially coincide with each other are extracted, and the extracted dots are converted into a single straight line segment or a single straight line segment including a plurality of straight line segments connected in series to each other. The emergency escape route guidance system according to claim 1, wherein the route is converted into a row, and the successful escape route is defined as one straight line segment or one straight line segment row. The evacuation route estimation unit includes a disaster determination unit that determines whether a disaster has occurred in the building,
The evacuation route estimating unit is activated when the disaster determining unit determines that a disaster has occurred,
The successful escape route estimation unit includes an escape determination unit that determines whether any of the escape applicants has successfully escaped from the building.
The successful escape route estimating unit is, among the plurality of estimated evacuation routes, one that is estimated to have been used by a plurality of escape applicants determined by the escape determination unit to have successfully escaped from the building. 3. The disaster escape route guidance system according to claim 1, wherein the evacuation route guide system is configured to estimate the successful escape route from the selected plurality of evacuation routes. 4.   4. The disaster escape route guidance system according to claim 3, wherein the disaster determination unit is linked to a fire alarm installed in the building or a disaster monitoring system existing outside the building. 5. The building has a plurality of entrances as the exits,
The plurality of transmitters include a plurality of entrance transmitters respectively installed at the plurality of entrances,
When the escape determination unit receives the transmitter ID of any one of the entrance transmitters from the communication terminal of each of the escape applicants, each of the escape applicants receives the one of the plurality of entrances from the building. 4. The disaster escape route guidance system according to claim 3, wherein it is determined that the vehicle has succeeded in escaping through the one where the entrance transmitter is installed.   A program for causing a computer to function as the management server according to claim 1.   A recording medium on which the program according to claim 6 is recorded in a computer-readable manner.

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